Bi-directional DC Power Supplies

Conventional and regenerative power supply

DC Power Supplies

Bidirectional Power

Industrial Series

DC Electronic Load

EA Bidirectional DC Programmable Power Supplies

The Bidirectional DC power supply with integrated, regenerative electronic load series EA-PSB 10000 provides 15kW in 3U or 30kW in 4U chassis with up to 2000 VDC. This series easily parallels supplies for almost 1.92MW of power. All EA Elektro-Automatik DC power supplies and loads feature true autoranging and thus over additional operating ranges.
The lower the test voltage, the higher currents are possible. Likewise, higher voltages are available for lower currents. This means that a much wider range of test routines can be covered with a bidirectional DC power supply. The PSB series of bidirectional DC power supply features 5″ TFT touch panel display for intuitive control, setup and programming. The intelligent interface allows you to configure and test quickly without the need for extensive manual review. EA bidirectional dc power supplies come standard with an arbitrary waveform function generator, swappable digital interface control and built-in test routines for battery test, photovoltaic simulation and MPP tracking, to name a few.

True Autoranging – Advantages for Test

All EA bidirectional DC power supplies offer true autoranging. This means that the full source and sink power of the devices is available over additional operating ranges. The lower the current required in these ranges the higher the voltage available. Higher currents are possible at lower voltages. This allows a wider range of DUTs to be tested with a single power supply. EA’s autoranging feature provides full power, output as well as input, starting at 33% of system voltage and also current.

  • Save budget and space
  • No oversizing supply
  • One supply tests more
  • Versatile for future tests

Regenerative Energy Recovery

The PSB is bidirectional, meaning it can source (provide) or sink (absorb) current and regenerate that current to the local power grid with up to 96% efficiency. The built-in electronic load function is regenerative, making the PSB a very green solution on top of minimizing investment and test equipment space.

  • Save electricity + costs
  • Efficiency approx. 96%
  • Quick return on investment
  • Environmentally friendly

Waveform Function Generator

A common need for DC power supplies is to deliver the output voltage or current with a pattern other than a straight-line DC signal. EA’s built-in function generator includes options for sine, triangle, rectangle, and trapezoid waveforms, as well as custom arbitrary wave forms. Additionally, there are configuration tools for ramping, UI and IU tables, and simulations for fuel cells and photovoltaics.

Swappable Anybus Remote Control

EA “Anybus” modules are easily installed by the user and can be swapped out with just a few minutes and a screwdriver when different communication protocols are desired. For computer or remote control, you have many choices, such as Ethernet, USB, EtherCAT, ProfiNET, ProfiBUS, CAN, CANOpen, Modbus, Devicenet and RS232 interfaces.

Device Types and Series

19 Inch slide-in housing

(Series PSB 10000)

Technical Specifications

  • Nominal power: 2500W to 30000W
    Systems up to 1.92MW parallel operation
  • Nominal voltage: 60V to 2000V
  • Nominal current: 0-20A to 0-1000A (Systems up to 64000A)


  • Autoranging
  • Color touch screen
  • 3-ways onboard Interface
  • Master-Slave-Bus for parallel connection
  • 19″ Full insertion
  • 3 U or 4 U housing
  • Analog and USB interface, further options retrofittable
  • Microprocessor (FPGA) controlled
  • Color touch panel
  • Internal resistance control
  • Battery test mode
  • Arbitrary generator & car startup curve
  • Optional: Digital, pluggable interface modules
  • SCPI and ModBus protocol
  • LabView VIs and control software 
  • Ethernet / USB / Analog as standard / plug’n’play-Slot for additional interfaces

Cabinet System

Modules / Power / Series

  • Modular rack systems with 42U, 38U, 24U and 15U
  • Integrable devices in height units 3U, 4U and 6U
    • 300 kW in only one 42U rack with 5 units á 60 kW/6U
    • 3.84 MW in only 13 racks with up to 64 devices
  • Integrable series:
    • EA-10000
    • EA-10000 Industrial
    • EA-BT 20000 


EA bidirectional programmable DC power supplies with 19-inch racks can be combined in EA cabinet systems. Adaptation to numerous industrial requirements is possible.

Select devices and integrate into the rack

New high-performance systems are constantly being developed for the electrification of the world. Associated with this is the testing requirement for the battery packs, fuel cell stacks, solar systems or electrolysis systems (or: electrolysers). With the modular EA rack system you have the possibility to select the suitable devices for your tests and simulations and to integrate them into the modular EA rack system

Power supplies and loads

Configure 3U, 4U and 6U devices into 42U, 38U, 24U and 15U rack systems. Combine EA-10000 and EA-10000 Industrial series programmable power supplies, bidirectional power supplies, or regenerative loads. System performance can be increased by connecting devices in parallel. In a 42U rack with 5 units of 60 kW you can reach 300 kW, for the maximum power of 3.84 MW you can connect up to 64 units in 13 racks.

  • Application for battery, photovoltaics, electrolysis, fuel cell and many more
  • For 380 V, 400 V and 480 V AC
  • Programmable power supplies (PSI, PS, PU), Bidirectional Power supplies (PSB, PSBE, PUB) and regenerative loads (ELR, PUL).
  • Intuitive operation through the multilingual color TFT touch panel
  • Function generator
  • Extensive protective functions (OVP, OCP, OT, …)
  • USB, Ethernet and analog interface as standard
  • Plug & Play slot for digital interfaces
  • All interfaces galvanically isolated
  • Control software EA Power Control
  • Simulation software EA Battery Simulator
  • LabVIEW VI User Library
  • IVI driver package
  • DBC-Files
  • SCPI and ModBus protocol
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